Volume 46, Issue 2 pp. 221-231
ORIGINAL ARTICLE

Profiling of extracellular vesicle-bound miRNA to identify candidate biomarkers of chronic alcohol drinking in nonhuman primates

Sloan A. Lewis

Sloan A. Lewis

Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, California, USA

Institute for Immunology, University of California Irvine, Irvine, California, USA

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Brianna Doratt

Brianna Doratt

Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, California, USA

Institute for Immunology, University of California Irvine, Irvine, California, USA

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Suhas Sureshchandra

Suhas Sureshchandra

Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, California, USA

Institute for Immunology, University of California Irvine, Irvine, California, USA

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Tianyu Pan

Tianyu Pan

Department of Statistics, University of California Irvine, Irvine, California, USA

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Steven W. Gonzales

Steven W. Gonzales

Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon, USA

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Weining Shen

Weining Shen

Department of Statistics, University of California Irvine, Irvine, California, USA

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Kathleen A. Grant

Kathleen A. Grant

Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon, USA

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Ilhem Messaoudi

Corresponding Author

Ilhem Messaoudi

Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine, California, USA

Institute for Immunology, University of California Irvine, Irvine, California, USA

University of Kentucky, 760 Press Avenue, Lexington, United States, 40536-0679 USA

Correspondence

Ilhem Messaoudi, Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, 760 Press Avenue, Lexington, KY 40536

Email: [email protected]

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First published: 15 December 2021
Citations: 5

Funding information

This study was supported by NIH 1R21AA025839-01A1 (Messaoudi), 5U01AA013510-20 (Grant), and 2R24AA019431-11 (Grant). S.A.L. is supported by NIH 1F31A028704-01. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH.

Abstract

Background

Long-term alcohol drinking is associated with numerous health complications including susceptibility to infection, cancer, and organ damage. However, due to the complex nature of human drinking behavior, it has been challenging to identify reliable biomarkers of alcohol drinking behavior prior to signs of overt organ damage. Recently, extracellular vesicle-bound microRNAs (EV-miRNAs) have been found to be consistent biomarkers of conditions that include cancer and liver disease.

Methods

In this study, we profiled the plasma EV-miRNA content by miRNA-Seq from 80 nonhuman primates after 12 months of voluntary alcohol drinking.

Results

We identified a list of up- and downregulated EV-miRNA candidate biomarkers of heavy drinking and those positively correlated with ethanol dose. We overexpressed these candidate miRNAs in control primary peripheral immune cells to assess their potential functional mechanisms. We found that overexpression of miR-155, miR-154, miR-34c, miR-450a, and miR-204 led to increased production of the inflammatory cytokines TNFα or IL-6 in peripheral blood mononuclear cells after stimulation.

Conclusion

This exploratory study identified several EV-miRNAs that could serve as biomarkers of long-term alcohol drinking and provide a mechanism to explain alcohol-induced peripheral inflammation.

Graphical Abstract

Due to the complex nature of human drinking behavior, it has been challenging to identify reliable biomarkers of alcohol use that could be used to determine drinking behavior prior to signs of overt organ damage. This study profiles the plasma EV-miRNA content of 80 non-human primates after 12 months of voluntary ethanol drinking by miRNA-Seq. We identified several EV-miRNA that could serve as biomarkers of long-term alcohol drinking as well as provided a mechanism for alcohol-induced peripheral inflammation.

CONFLICT OF INTEREST

No competing interests reported.

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